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// Copyright 2021 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
package dev.pigweed.pw_rpc;
import com.google.protobuf.MessageLite;
import dev.pigweed.pw_rpc.internal.Packet.PacketType;
import dev.pigweed.pw_rpc.internal.Packet.RpcPacket;
/** Encodes pw_rpc packets of various types. */
/* package */ class Packets {
private Packets() {}
public static byte[] request(PendingRpc rpc, MessageLite payload) {
RpcPacket.Builder builder = RpcPacket.newBuilder()
.setType(PacketType.REQUEST)
.setChannelId(rpc.channel().id())
.setServiceId(rpc.service().id())
.setMethodId(rpc.method().id());
if (payload != null) {
builder.setPayload(payload.toByteString());
}
return builder.build().toByteArray();
}
public static byte[] cancel(PendingRpc rpc) {
return RpcPacket.newBuilder()
.setType(PacketType.CLIENT_ERROR)
.setChannelId(rpc.channel().id())
.setServiceId(rpc.service().id())
.setMethodId(rpc.method().id())
.setStatus(Status.CANCELLED.code())
.build()
.toByteArray();
}
public static byte[] error(RpcPacket packet, Status status) {
return RpcPacket.newBuilder()
.setType(PacketType.CLIENT_ERROR)
.setChannelId(packet.getChannelId())
.setServiceId(packet.getServiceId())
.setMethodId(packet.getMethodId())
.setStatus(status.code())
.build()
.toByteArray();
}
public static byte[] clientStream(PendingRpc rpc, MessageLite payload) {
return RpcPacket.newBuilder()
.setType(PacketType.CLIENT_STREAM)
.setChannelId(rpc.channel().id())
.setServiceId(rpc.service().id())
.setMethodId(rpc.method().id())
.setPayload(payload.toByteString())
.build()
.toByteArray();
}
public static byte[] clientStreamEnd(PendingRpc rpc) {
return RpcPacket.newBuilder()
.setType(PacketType.CLIENT_REQUEST_COMPLETION)
.setChannelId(rpc.channel().id())
.setServiceId(rpc.service().id())
.setMethodId(rpc.method().id())
.build()
.toByteArray();
}
}
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